Heat-treating and forging furnace.



1. v. GITHENS,

HEAT TREATING AND FORGING FURNACE.

APPLICATION FILED MAR.29. I918.

1 ,298,327. Patented Mar. 25, 1919 4 SHEETS-SHEET I.

C2 F2 I c (31400144501 W W 'ym J V. GITHENS.

HEAT TREATING AND FORGING FURNACE.

APPLICATION FILED MAR. 29. I918.

1,298,327. Patented Mar. 25,1919.

4 SHEETS-SHEET 2.

avvuemtoz J. V. GITHENS.

HEAT TREATING AND FORGING FURNACE.

APPLICATION FILED MAR. 29. 19l8.

1,298,327. Patented Mar. 25, 1919.

4 SHEETS-SHEET 3.

J. V. GITHENS.

HEAT TREATING AND FORGING FURNACE.

APPLICATION FILED MAR. 29. 19w.

1 ,298,327, Patented Mar. 25, 1919.

C C2 fi '5] v rave/"01 attowmg JAMES V. GITHENS, OF KNOXVILLE,TENNESSEE.

HEAT-TREATING AND FOBGING FURNACE.

Application filed March 29, 1918.

T0 all-whom it may concern Be it known that I, JAMES V. GIT-KENS, acitizen of the United States, residing at Knoxville, in the county ofKnox and State of Tennessee, have invented a new and useful Improvementin Heat-Treating and Forging Furnaces, of which the following is aspecification, reference being had to the accompanying drawing.

My improvement relates particularly to furnaces for use in industrialoperations requiring the heating of articles for the purpose of forgingor annealing or similar treatment.

The object of the invention is to incorporate in such a furnace improvedmeans for moving the articles to be treated progressively through'thefurnace chamber.

Furnaces of this type have heretofore been made with means intended tomove such articles through the furnace chamber; but such means have beendeficient in important respects, one of which the requirement of arelatively large amount of power to operate the apparatus which movesthe articles.

One feature of my apparatus is its adaptabilitv to move the articles byrolling instead of bodily lifting them.

In the accompanying drawings,

Figure 1 is a transverse section illustrating a furnace embodying myimprovement, the view being toward. the rear or discharge end of thefurnace;

Fig. .2 is a horizontal section of the structure shown by Fig. 1;

Fig. 3 is a section on the line, 33, of Fig. 1, looking toward the left;

Fig. 4 shows a form in which levers are interposed between-the cams andthe upright, reciprocatory driving members or drivers, the cams beinglocated outside of the furnace body;

Fig. 5 is a horizontal section of the apparatus shown in-Fig. 4;

Fig. 6 and Fig. 7 show a driver combined with a receptacle which isinterposed between the driver and the lifting cam.

Referring to said drawingsyrk is the body of the furnace, A is the floorof the furnace. A is foundation masonry supporting the floor. Lengthwiseof the furnace are two upright slots extending through the floor and thefoundation. In each of said slots is a horizontal shaft, B, bearingcams, B. On each of said cams rests a driving mem- Specification ofLetters Patent.

Patented Mar. 25, 1919.

Serial No. 225.564.

her or driver, B which is adapted to be lifted and allowed to descend bygravity during the rotations of the cam. The upper part of each slot, A,is shown contracted,

in order that the driving members may be relatively thin measuringhorizontally and transversely to the slots. Measuring horizontally inthe other direction, the driving members are relatively wide, and theirupper ends are slanted, the part which is toward the discharge end ofthe furnace being the lower. T he cams are so formed as to allow theentire driving member to descend below the upper face of the floor whenthe axis of 7 the cam is above the cam shaft, and so that all of theupper end of the driving member will extend above the furnace floor whenthe long radius of the cam is above'the cam shaft. one cam having itslong radius at one side of the cam shaft and the other having its longradius at the opposite side of the cam shaft. Under this arrangement,one driver extends above the floor while the next forward driver (towardthe discharge end of the furnace) in its lower position-below thefurnace floor.

At the receiving end of the furnace, ar-

ticles which are to be heated are placed upon the floor of the furnacetransversely to and across the two lines of drivers. \Vhen a pair ofdrivers rise under any such article, said article slips or rolls forwardon the drivers while the drivers move upward.

as was done by the last preceding pair of 96 drivers. In this manner,the article is driven forward progressively by the series of driv- .e'rsuntil the article is discharged from the discharge end of the furnace.The time required by the article in traversing the fur- 100 nace floordepends upon the length of the furnace and the number of the drivers andthe velocity of the cam shafts.

Each of the drivers has a downward extension, B", at each side of itscam whereby the drivers are held against movement parallel to the slots,A The side Walls of the slots hold the drivers against'sidewise movementtransversely of the slots. The drivers are to be made of fire brick ormetal or other suitable heat-resisting material.

In Figs. 4 and 5, the cam shafts, B, are

The cams are arranged alternately, 75

located at/opposite sides of the furnace and adjacent each cam a lever,C, extends through a slot, C in the foundation, A and is pivoted at Cone end of the lever extending beneath the cam and the other endextending beneath and pivoted to one of the drivers. When the cam isrotated, the lever, C, is rocked on the pivot, C whereby the driver isfirst lifted and then allowed to descend. The cam shafts, B. B. areconnected to a common drive shaft. B by miter gears, B, for simultaneousdriving.

Figs. 6 and 7 illustrate a driver combined with a socket or receptacle.The receptacle rests on a cam, B. At each side of the cam, thereceptacle has a downward extension, B similar to the downwardextensions. on the driver shown in Figs. 1 and 3. The driver has a stem,B".- extending into the socket or receptacle. At each side of the driveris a flange, 6 extending laterally over the upper edge of thereceptacle. The receptacle may be regarded as a part of the driver, itbeing assumed that the driver is composedof an upper and a lowersection. By using these two parts or sections, the upper part may bereplaced separately when damaged by heat. That course is more economicalthan replacing the entire structure. Furthermore, When the two parts areused, one may be made of one material and another of another material.the receptacle may be of cast iron while the part, B is made of firebrick. For the treatment of some materials passing through the furnace ahigh degree of heat is required.

In such cases, the upper part of the drivers should be adapted to resistsuch high heat.

I claim as my invention,

1. In an apparatus of the nature described, a furnace floor havingupright slots, a plurality of drivers located in each of said slots in arow parallel to the slot, and means for actuating adjacent drivers inalternation, substantially as described.

2. In an apparatus of the nature described, a furnace floor havingupright slots, a plurality of drivers located in each of said slots andhaving inclined upper faces and being arranged in a row parallel to theslot, and means for actuating adjacent drivers in alternation,substantially as described.

3. In an apparatus of the nature described,

a furnace floor having upright slots, a plurality of drivers located ineach of said slots in a row parallel to the slot, and cam mechanism foractuatin adjacent drivers in alternation, substantlally as described.

4. In an apparatus of the nature described, a furnace floor havingupright slots, :1. plu- For example,

rality of drivers located in eachof said slots and having inclined upperfaces and being arranged in a row parallel to the slot, and cammechanism for actuating adjacent drivers in alternation, substantiallyas de scribed.

5. In an apparatus of the nature described, a furnace floor havingupright slots, a plurality of drivers located in each of said slots in arow parallel to the slot. and means adjacent each driver for engagingand holding said driver against movement parallel to the slot andimparting up and down movement to the driver, substantially asdescribed.

5. In an apparatus of the nature described, a furnace floor havingupright. slots. a plurality of drivers located in each of said slots ina row parallel to the slot, and a cam adacent each driver enga iw andholdin P 21 said driver against movement parallel to the slot andimparting up and down movement to the driver, substantially as described.

T. In an apparatus of the nature described, a furnace floor havingupright slots. at plurality of drivers located in each of said slots ina row parallel to the slot and the drivers having their lower partsnotched, and means adjacent each driver for engaging in the slot of thatdriver and imparting up and down movement to the driver, substantiallyas described.

8. In an apparatus of the nature described,

\ a furnace floor having upright slots. a plurality of drivers locatedin each of said slots in a row parallel to the slot and the drivershaving their lower parts notched, and a cam adjacent each driver forengaging in the slot of that driver and imparting up and down movementto the driver, substantially as described.

9. In an apparatus of the nature described, a furnace floor havingupright slots, a plurality of drivers located in each of said slots in arow parallel to the slotaa receptacle for each driver, and means forimparting alternating up and down movement to the receptacles,substantially as described.

10. In an apparatus of the nature described, a furnace floor havingupright slots, a plurality of drivers located in each of said slots in arow parallelto the slot, a receptacle for each driver, and earns forimparting alternating up and down movement to the receptacles,substantially as described.

In testimony whereof I have signed my name this 23d day of March, in theyear one thousand nine hundred and eighteen.

JAMES V. GITHENS.

